Seaming mechanism



Nov. 10, 1925 2 Sheets-Sheet 1 J. BRENZINGER SEAMING MECHANISM Filed Aug. 1'7, 1922 IN V EN TOR Jielz'ad Bren inyer BY 1 A TTORNE Y Nov. 10,1925 -1.5 1.307

J. BRENZINGER SEAMING MECHANISM Filed Aug. 17, 1922 2 sheets sheet 2 539 z w m 4 1 ENTOR Jizlz'as Bren ir zger -BY MW ATTORNEY Patented Nov. 10, 1925.

UNITED STATES PATENT orrlce JULIUS BRENZINGER, OF FAIRFIELD, CONNECTICUT, ASSIGNOB TO THE MAX 'AMS MACHINE COMPANY, OF BRIDGEPORT, CONNECTICUT, A CORPORATION OF NEW YORK.

SEAMING MECHANISM.

Application filed. August 17, 1922. Serial No. 582,378.

To all whom it may concern:

Be it known that I, JULIUS BRENZINGER, a citizen of the United States, and a resident of Fair-field, in the county of Fairfield and State of Connecticut, have invented certain new and useful Improvements in seaming Mechanism, of which the follow ing is a specification.

This invention relates to seaming mechanism for containers and covers and has more particular reference to that part of the seaming mechanism which relates to the flattening or finishing operation. The main ob ject and feature of the invention resides in the production of a better and more reliable seam.

In the accompanying drawings, the invention is shown in a concrete and preferred form in which-- Fig. 1 is a vertical sectional view through a seaming mechanism showing the means for effecting the preliminary or curling operation.

Fig. 2 is an enlarged detail view showing the action of the parts of Fig. 1 on a con tainer and cover.

Fig. 3 is a vertical sectional view through a seaming mechanism showing the means for effecting the finishing or flattening operation.

Fig. 4 is an enlarged detail view showing the action of the parts of Fig. 3 on a container and cover.

Referring 'to Figs. 1 and 2, 1 indicates a chuck and 2 is the seaming roller. These parts may be of standard construction and it will be understood that either container 3 or seaming roller 2 may rotate as may be desired and that the seaming roller has an in-and-out movement in the usual way to effect the preliminary or curling operation. The chuck is provided with a head 4 that enters a depression 5 in cover 6; and the seaming roller is provided with a seaming surface 7 that, by pressure against the flanges of the container and cover, produces a preliminary curling of the seam to be formed.

As above indicated, this is standard construction and serves well enough for the preliminary or curling operation which is mere- 1y a loose interlocking of the flanges of the container and cover but, when it comes to the flattening ortinishing operation, different problems from those to be found in the curling operation are encountered. As is ing surface. This is notalways productive of the best results and. that for several reasons. lVl'ien the finishing or flattening sur face is brought home against the seam it sometimes happens that the seam is turned over inwardly instead of downwardly or that the metal flows in above the head 4 thereby producing inwardly projecting burs. At other times the metal is pinched and the seam is partly destroyed. Again, it may happen that head 4 will press countersunk part of the cover deeper into the container thereby reducing the extent of interlocking between the container and cover and to prevent this latter condition recourse is had to a very fine adjustment between the lower pedestal and the head, which adjustment, un ess made very carefully, will prevent proper clamping of the container and thereby, in machines of. the type where the work rotates, prevent proper rotation of the work thereby keeping the flattening roller from rolling the seam tight all around the can. In addition, since the seaming roller depends for its own axial rotation upon frictional contact with the work, such. rotation must necessarily vary with different operating conditions.

Turning now our attention to Figs. 3 and 4, which show the flattening or finishing roller, it will be noted that chuck 8 is provided, in addition to head 9 fitting within the depression 10 of cover 11, with a circumferential flange 12, above said head 9, of greater diameter than that of the container to be seamed, the circumferential portion of the cover bearing against the surface 16 on the seaming tool engaging lower surface 17 of the flange. It Will be understood that with this construction it is impossible for the seam to turn over inwardly by reason of flange 12; also that it is not necessary to effect any extremely delicate adjustment between the chuck and pedestal but that the container can be gripped tightly between said chuck and pedestal thereby insuring proper rotation of the parts and also preventing undue depression of the cover into the container.

In addition, the downwardly facing part or surface 18 of groove 15 will be pressed against the upper part or surface 19 of flange 12 so that uniform rotation of the seaming roller around its axis is assured by the resulting frictional contact.

I claim:

1. Seaming mechanism comprising a chuck having a head to enter the depressed portion of a container cover and a circumferential flange, of greater diameter than the container to be seamed and in a plane above the latter, against the underside of which the circumferential portion of the cover bears, and a coacting seaming roller having a seaming surface and having an upper surface above the seaming surface engaging the lower surface of the flange.

2. Seaming mechanism comprising a chuck having a head to enter the'deprcssed portion of a container cover and a circum ferential flange, of greater diameter than the container to be seamed and in a plane above the latter, against the underside of which the circumferential portion of the cover bears, and a coacting seaming roller having a seaming surface and having a circumferential groove above the seaming surface to receive, and engage both the up per and lower surfaces of, the flange of the chuck.

Signed at New York, in the county of New York and State of New York, this 15th day of August, 1922.

JULIUS BRENZINGER. 

